Fushimi Inari Shrine (伏見稲荷大社). It has great history, impressive architectures, and mountain trails. It takes not just enormous amount of effort to construct and maintain the shrine, but dedicated spirit. I went in the morning and spent nearly 3 hours there. I can’t recommend enough.
Honden (the main shrine).
Senbon Torii (Thousand Torii).
The color vermillion of the torii signifies to oppose evil intentions.